Optimization and Comparison of Novel E-Core and C-Core Linear Switched Flux PM Machines

Wei, Min; Chen, J. T.; Zhu, Z. Q.; Zhu, Yu; Zhang, M.; Duan, Gaoyan

doi:10.1109/tmag.2011.2125977

Cited by 81 publications

(50 citation statements)

References 19 publications

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“…The 6/13LFSPM-C machine can be developed from the conventional LFSPM machines by removing six mover poles and increasing the slot area. The 6/13LFSPM-C machine is found to have higher thrust density than the conventional LFSPM machine due to a larger slot area, as shown in Figure 1b [11].…”

Section: Machine Topologymentioning

confidence: 97%

“…Both C-core LFSPM machines are found to have better thrust and power capabilities when compared with the conventional structures [11,12], however, thrust force has not been previously compared between these two machines. In this section, the two C-core LFSPM machines are compared with an emphasis on the thrust force using finite element analysis (FEA) with ANSOFT Maxwell software 2D.…”

Section: Thrust Force Comparisonmentioning

confidence: 99%

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Thrust Force Ripple Reduction of Two C-Core Linear Flux-Switching Permanent Magnet Machines of High Thrust Force Capability

Hao

Wang

2017

Energies

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Linear flux-switching permanent magnetic (LFSPM) machines are good choices for long stroke applications. These machines deliver high thrust force density in addition to the machine structure where permanent magnetics (PMs) and windings are all on the short mover. For LFSPM machines, their performance is always affected by big thrust force ripple. In this paper, for two C-core LFSPM machines of high thrust force capability, including a 6/13 C-core LFSPM (6/13LFSPM-C) machine and a sandwiched C-core LFSPM (SLFSPM-C) machine, and a thrust force ripple reduction method is proposed. The proposed method is developed by reducing the slot effect component of the cogging force based on staggered stator tooth, and suppressing the thrust force ripple caused by unbalanced three phase back-electromagnetic forces (EMFs) based on two end PMs. Based on finite element analysis (FEA) results, both C-core LFSPM machines can achieve small thrust force ripples as well as high sinusoidal back-EMFs, and at the same time, maintain high thrust force capability with the proposed method. It was also found that, the improved SLFSPM-C machine exhibited the same thrust force capability as the improved 6/13LFSPM-C machine, but with a much smaller thrust force ripple.

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Section: Machine Topologymentioning

confidence: 97%

Section: Thrust Force Comparisonmentioning

confidence: 99%

Thrust Force Ripple Reduction of Two C-Core Linear Flux-Switching Permanent Magnet Machines of High Thrust Force Capability

Hao

Wang

2017

Energies

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“…Figure 2a shows an original C-core LFSPM machine, named "Machine I" in this paper, which can be obtained by splitting a rotary 6/13-pole C-core FSPM machine along the radial direction and unrolling it. It should be notice that the 6/13 mover and stator pole combination is selected in this paper because it can achieve the maximum no-load EMF and thrust force [20].…”

Section: Machine Configuration and Operation Principlementioning

confidence: 99%

“…On the other hand, the magnetic flux density is considered to ensure the iron core to be unsaturation. Moreover, the individual parameter optimization method [20] is adopted in the key parameter optimization. On the other hand, the magnetic flux density is considered to ensure the iron core to be unsaturation.…”

Section: Key Parameter Optimizationmentioning

confidence: 99%

“…Meanwhile lots of linear versions of FSPM (LFSPM) machines also have been presented for linear industry applications [19]. In [20], E-core and C-core LFSPM machines were optimized and compared. Due to the improvement of the armature winding slot area compared with traditional U-core LFSPM machines, the C-core LFSPM machines can achieve a higher thrust force density and power density, in spite of the lesser usage of the PMs.…”

Section: Introductionmentioning

confidence: 99%

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Detent Force Reduction of a C-Core Linear Flux-Switching Permanent Magnet Machine with Multiple Additional Teeth

Yang

Quan

et al. 2017

Energies

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C-core linear flux-switching permanent magnet (PM) machines (LFSPMs) are attracting more and more attention due to their advantages of simplicity and robustness of the secondary side, high power density and high torque density, in which both PMs and armature windings are housed in the primary side. The primary salient tooth wound with a concentrated winding consists of C-shaped iron core segments between which PMs are sandwiched and the magnetization directions of these PMs are adjacent and alternant in the horizontal direction. On the other hand, the secondary side is composed of a simple iron core with salient teeth so that it is very suitable for long stroke applications. However, the detent force of the C-core LFSPM machine is relatively high and the magnetic circuit is unbalanced due to the end effect. Thus, a new multiple additional tooth which consists of an active and a traditional passive additional tooth, is employed at each end side of the primary in this paper, so that the asymmetry due to end effect can be depressed and the detent force can be reduced by adjusting the passive additional tooth position. By using the finite element method, the characteristics and performances of the proposed machine are analyzed and verified.

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Innovation of Electrical Machine Topologies

2022

General Airgap Field Modulation Theory for Electrical Machines

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Optimization and Comparison of Novel E-Core and C-Core Linear Switched Flux PM Machines

Cited by 81 publications

References 19 publications

Thrust Force Ripple Reduction of Two C-Core Linear Flux-Switching Permanent Magnet Machines of High Thrust Force Capability

Thrust Force Ripple Reduction of Two C-Core Linear Flux-Switching Permanent Magnet Machines of High Thrust Force Capability

Detent Force Reduction of a C-Core Linear Flux-Switching Permanent Magnet Machine with Multiple Additional Teeth

Innovation of Electrical Machine Topologies

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